O'Rielys Drums out of round/major vibrations.

I'll add my experience to the search results to help others.

I did the rear brakes and didn't anticipate the drums being 1/1,000th" from being out of spec. Turning them would have put them there. So I made a snap decision to go with their replacements. Brake Best I believe. Well the title says it all, and man was the vibration bad. Did some searching and found similar issues with aftermarket varieties. My originals lasted 145k mi and the original shoes had plenty of life left though they were wearing a bit unevenly. I'm amazes at how long the rears lasted. The drums wore out faster than the shoes.

What irks me is that I could have turned them but that decreases the life of a brand new drum. I didn't want to fiddle around and see if it was one the other or both. Frustrating.

So OEM here I come. OEM has proven the way to go for me 90% of the time. And with Toyota of Dallas pricing and same day pickup, it's hard to beat.

I'll revise this if the Toyota drums somehow don't fix this issue but somehow I think I'll be ok...

 

Long ago I learned Brake Drums and Rotors need to be stored flat or hard to believe they will warp

Since pretty often for the most of the chain stores are clueless it is possible the store these in a vertical position.

I had good luck with the Napa Drums I just installed

 

I would think its more likely they were palleted standing on end and the pallet was dropped or had too much weight stacked on top of it.

they are turned when they are made so short of machine malfunction (which happens) its very uncommon to get them out of round like that

 

They looked good and seemed well made. I thought when adjusting the shoes that it wasn't a big deal that they rubbed for about 45 degrees of the 360 degrees of rotation. Come to think of it they both did that. I thought it the shoes would align to the drum after a few pumps of the brakes after the adjustments were made. Oh well I already have drums from Toyota Dallas on order. I'll be picking them up on Monday and that will be that, I hope.

 

You always turn new drums out of the box. They are not machined true from the factory and improper storage methods, like sitting on the edge instead of being stored flat, will make them go out of round.

 

the drums aren't casted or "poured" with a turned pad surface, they are spun balanced and weights are welded onto the drun then it is machine turned smooth true and round at the time its made. the very act of turning them makes them true, you CANNOT turn something and it NOT be true.

now its never a bad idea to check them and have them returned before using but they are turned when made.

 

You missed the point again. Cast iron distorts in a very short time. If drums are stored on their edge, they will be out of round. You turn them to make the Inside surface true again. As a rule you always turn new drums.

 

no, I was only disputing your claim that

because they are.

I was NOT disputing (or endorsing) your claim that they change shape after casting

as a real world observation, I have never needed to turn a rotor or drum out of the box for any of the 20 some odd brake jobs I have done and I specifically check them for being out of round and only had one that was returned and replaced for a good one.

your advice is good and based on sound logic but the blanket assumption they all need turning I do not agree with based on actual proven experience

 

Picking up Toyota rotors in the AM. I'll have them on and tested hopefully by the afternoon. I'll ask the parts dept., just for shits, if they recommend a turn prior to install. I'll ask the same of the guys at o'Rileys as well. Again just because I can. I agree that if they are turned, they're true, but shit happens, who knows why they are out of round.

 

Not to many places in this part of the country even turn drums or rotors any more just replace .

to time consuming